worried about feeding? keep in mind that the belted magnums are for the most part, children of the great 375 h&h magnum and are called that because of their lineage. the belt was put on the 375 to improve feeding over rimmed cartridges. the belt will not catch on the next round in the magazine. headspacing is positive, every time just like a rimmed cartridge. rimless cartridges leave a lot to be desired in that area. once fired a rimless cartridge with neck sizing only and a good shoulder should headspace the same every time, but for those who do not handload, they have to put up with manufacturers tolerance. the 375 family of cartridges offer a greater magazine capacity over the short mags with a slightly longer bolt throw. BFD! trust me if your next shot depended on a quarter inch or whatever of bolt travel, then your life better be at stake. and even then i doubt it would make much differance. rimless cartridges feed better out of semis but they are generally not as accurate as bolts. so ask yourself is this for target, hunting or personal defense? for target, all the accuracy you can get is important. for hunting, most of the equipment we spend hard earned cash on is more capable than we are. for personal defense, if that is a situation you live with constantly then move! call the police!, or buy a good shotgun most of your work will happen at close range anyway. there, thats my 2 cents and its probably worth every penny you paid for it. i think the short mags are a marketing scheme, but they have found their niche there is no magic in the numbers and it is all kinnetic energy (remember grade nine?.... yeah it bored me to tears too.) what we are blessed with today is better bullets, better manufacturing (on a large scale, custom will always be best) and a better informed individual. people are just more technical thes days. deer, moose and bears however are built the same way they were 1000 years ago. two legged filth is too.